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I am guessing you are asking about a 223...... depends on the bullet construction...and how many rpms it can take...... SX bullets(light jacket) would spin apart if fired from a 220 swift at max velocity.    an all copper bullet you could launch at about any velocity.... if the bullet has a thick jacket it can take a lot  rpms.....

ackleyman's comment about the leade was interesting to me.. good info


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